/**
 * Copyright (C) 2011-2013 Nicolas Vinot <aeris@imirhil.fr>
 * Copyright (C) 2017 Christian Pierre MOMON <cmomon@april.org>
 *
 * This file is part of (April) Hebdobot.
 *
 * Hebdobot is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Hebdobot is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with Hebdobot.  If not, see <http://www.gnu.org/licenses/>
 */
package org.april.hebdobot.model;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Iterator;

import org.apache.commons.io.FileUtils;
import org.apache.commons.lang3.StringUtils;
import org.april.hebdobot.HebdobotException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import fr.devinsy.util.strings.StringList;

/**
 * The Class UserAliases.
 */
public class UserAliases extends HashMap<String, String>
{
    private static final long serialVersionUID = -7563433397065777556L;
    private static final Logger logger = LoggerFactory.getLogger(UserAliases.class);

    /**
     * Instantiates a new user aliases.
     */
    public UserAliases()
    {
        super();
    }

    /**
     * Instantiates a new user aliases.
     *
     * @param source
     *            the source
     * @throws HebdobotException
     *             the hebdobot exception
     */
    public UserAliases(final File source) throws HebdobotException
    {
        super();

        try
        {
            StringList lines = new StringList(FileUtils.readLines(source, StandardCharsets.UTF_8));

            for (String line : lines)
            {
                if ((StringUtils.isNotBlank(line)) && (!line.startsWith("#")))
                {
                    String[] tokens = line.split("=");
                    String realName = tokens[0];
                    String[] nicks = tokens[1].split(",");

                    for (String nick : nicks)
                    {
                        put(nick, realName);
                    }
                }
            }
        }
        catch (FileNotFoundException exception)
        {
            logger.warn("File not found.");
        }
        catch (IOException exception)
        {
            throw new HebdobotException("IO error.", exception);
        }
    }

    /**
     * Instantiates a new user aliases.
     *
     * @param source
     *            the source
     */
    public UserAliases(final UserAliases source)
    {
        super(source);
    }

    /**
     * Gets the real name.
     *
     * @param nick
     *            the nick
     * @return the real name
     */
    public String getRealName(final String nick)
    {
        String result;

        String realName = get(nick);

        if (realName == null)
        {
            boolean ended = false;
            Iterator<String> iterator = keySet().iterator();
            while (!ended)
            {
                if (iterator.hasNext())
                {
                    String currentNick = iterator.next();

                    if (nick.toLowerCase().contains(currentNick.toLowerCase()))
                    {
                        ended = true;
                        realName = get(currentNick);
                    }
                }
                else
                {
                    realName = nick;
                    ended = true;
                }
            }
        }

        result = realName + " (" + nick + ")";

        //
        return result;
    }

    /**
     * To line string.
     *
     * @return the string
     */
    public String toLineString()
    {
        String result;

        StringList buffer = new StringList();
        for (String nick : new StringList(this.keySet()).sort())
        {
            buffer.append(getRealName(nick));
            buffer.append(", ");
        }
        buffer.removeLast();

        result = buffer.toString();

        //
        return result;
    }

    /* (non-Javadoc)
     * @see java.util.AbstractMap#toString()
     */
    @Override
    public String toString()
    {
        String result;

        StringList buffer = new StringList();
        for (String nick : new StringList(this.keySet()).sort())
        {
            buffer.appendln(getRealName(nick));
        }

        result = buffer.toString();

        //
        return result;
    }
}